<?php
defined('BASEPATH') OR exit('No direct script access allowed');

	class User extends CI_Controller {
	public function login()
	{		
        $this->load->library('form_validation');
        $this->form_validation->set_error_delimiters('<div class="error">', '</div>');
        $this->form_validation->set_rules('username', '用户名', 'required');
		$this->form_validation->set_rules('password', '密码', 'required|callback__auth_check');
         $this->form_validation->set_rules('verify', '验证码', 'required|callback__check_verify');
        if ($this->form_validation->run() == FALSE)
        {
            $this->load->view('user_login');
        }
        else
        {   
            $username=$this->input->post('username');
            $password=md5($this->input->post('password'));
            $this->load->model("User_model");
            $data=$this->User_model->get_one($username,$password);
             $this->session->set_userdata('username', $username);
              $this->session->set_userdata('user_id', $data->id);
            redirect("Front/index");
        }
    }
     function _auth_check()
    {   
        $username=$this->input->post('username');
        $password=md5($this->input->post('password'));
        $this->load->model("User_model");
        $data=$this->User_model->get_one($username,$password);
        if ($data)
        {   
            $this->session->set_userdata('user_is_login', 'true');
             return TRUE;     
        }
        else
        {
             $this->form_validation->set_message('_auth_check', ' 用户名或者密码错误');
            return FALSE;           
        }
    }
    public function _check_verify()
    {
        if ($_SESSION["VerifyCode"]==$this->input->post('verify')) {
            return TRUE;    
        }
        else
        {
             $this->form_validation->set_message('_check_verify', ' 验证码错误');
            return FALSE;           
        }
    }
    public function verify()
    {   
        $num = 4; $size = 20; $width = 0; $height = 0;
         !$width && $width = $num * $size * 4 / 5 + 5;
         !$height && $height = $size + 10; 
         $str = "23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVW";
        $code = '';
        for ($i = 0; $i < $num; $i++) {
            $code .= $str[mt_rand(0, strlen($str)-1)];
        } 
        // 画图像
        $im = imagecreatetruecolor($width, $height); 
        // 定义要用到的颜色
        $back_color = imagecolorallocate($im, 235, 236, 237);
        $boer_color = imagecolorallocate($im, 118, 151, 199);
        $text_color = imagecolorallocate($im, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120)); 
        // 画背景
        imagefilledrectangle($im, 0, 0, $width, $height, $back_color); 
        // 画边框
        imagerectangle($im, 0, 0, $width-1, $height-1, $boer_color); 
        // 画干扰线
        for($i = 0;$i < 5;$i++) {
            $font_color = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
            imagearc($im, mt_rand(- $width, $width), mt_rand(- $height, $height), mt_rand(30, $width * 2), mt_rand(20, $height * 2), mt_rand(0, 360), mt_rand(0, 360), $font_color);
        } 
        // 画干扰点
        for($i = 0;$i < 50;$i++) {
            $font_color = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
            imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $font_color);
        } 
        // 画验证码
        @imagefttext($im, $size , 0, 5, $size + 3, $text_color, 'c:\\WINDOWS\\Fonts\\simsun.ttc', $code);
        $_SESSION["VerifyCode"]=$code; 
        header("Cache-Control: max-age=1, s-maxage=1, no-cache, must-revalidate");
        header("Content-type: image/png;charset=gb2312");
        imagepng($im);
        imagedestroy($im);
    }
    public function regedit()
    {   
        $this->load->library('form_validation');
        $this->form_validation->set_error_delimiters('<div class="error">', '</div>');
        $this->form_validation->set_rules('username', '用户名', 'required|callback__check_username');
        $this->form_validation->set_rules('password', '密码', 'required|min_length[6]|max_length[12]|alpha_numeric');
        $this->form_validation->set_rules('passwordagain', '重复密码', 'required|matches[password]');
       $this->form_validation->set_rules('verify', '验证码', 'required|callback__check_verify');
        if ($this->form_validation->run() == FALSE)
        {
            $this->load->view('user_regedit');
        }
        else
        {   
          $username=$this->input->post('username');
          $password=$this->input->post('password'); 
          $this->load->model('User_model');
          $this->User_model->add_user($username,$password);
          redirect("user/login");
        }
    }
    public function _check_username()
    {
        $username=$this->input->post('username');
        $this->load->model('User_model');
            if ($this->User_model->get_all_username($username)){
             $this->form_validation->set_message('_check_username', ' 用户名已经被注册');
             return FALSE;             
        }
        else{
             return TRUE;
        }
    }
     public function logout()
     {
        $this->session->sess_destroy();
        redirect("Front/index");
     }

}
